Fuse switch



July 11, 1933- J. B. TREscoTT Er .AL 1,917,780

FUSE SWITCH Filed Aug. 5, 1929 2 Sheets-Sheet l BV MyW /QTTOENE v6 `Iuly11, 1933.

J. B TRESCQTT ET AL 1,917,780

FUSE SWITCH Filed Aug. 5, 1929 2 Sheets-Sheet 2 IN1/5N TM5 JMW Wesco fhook i.

Patented July 11, 1933 PATENT OFFICE JOHN B. TRESCOTT, OF OVERLAN'D, ANDSAlJUlLL S.

BAKER, OF WEBSTER GROVES,

."LVKISSURI, ASSGNORS, BY MESNE ASSIGNMENTS, TO JA'MES R. KEARNEY CORPO-RATION, OF LQS, vISSIJ FR, A CORPORATON OF MISSOTJR FUSE SWITCHApplication lefl August 5, 1929.

Our invention relates to new and useful impinvements in high tensionfuse switches. More particularly it relates to a universal fuse switchwhich is adjustable to aecommodate diliere'nt length fuses Yfor variousvoltages and types.

High tensionv power lines are used with a large variety of voltages.Each different voltage requires a different length fuse and accordinglya different bracket to accommodate the various fuses. This fact places aheavy burden on the manufacturer of this equipment since he is requiredto stock all sizes, and in the case ot' fuse brackets this means a.large number ot patterns 'from which` to make the castings.

There is another variable factor in the cross arms of the line poles.These arms ce- .ie in different sizes and also call for difterentbracket accommodations.

With the foregoing in mind, the principal object ot our invention is toprovide a uniif'ersal fuse bracket to accommodate different lengthfuses.

A tuither object is to provide guides for the tuse terminals so that theproper engagement et the fuse is always effected.

A still further object of the invention is prevu` e attaching means onthe fuse for a i l. so that the hook stick engages the fuse adjacent theworking point.

Additional.' objects of the invention are to form the bracket withsectional arms, one men'iber et' each arm being rigidly carried by thebracket and the other member being in trictional engagement with thelirst member and under normal conditions held in proper ti e enga; gposition but adapted to be displaced or give under severe shocks orrecoil torce so to absorb said shocks and prevent damage or injury tothe bracket or rigid parts thereol.

llhen fuse is blown, the gases escaping thi-ouah the lower open end ofsaid tube pronoil which causes said tube to be forced ily, thereby dialacing it trom its cont members, It rigid stops are provided on erackets to check this upward movement et the tube the recoil torce istransmitted to said stops, causing breakage of the latter, or

Serial No. 383,734.

of the arms et which said stops form part. ln either case the mountingis seriously damaged, requiring repairs and replacement of the damagedparts and causing disablement of the line. By forming each arm of thebracket of two parts jointed and frictionally held together, the fusecarrying members of the jointed arms are adapted to yield under severeshocks and move upwardly with the fuse tube, thereby absorbing' theshock and preventing injury to the mounting and said tube. Tffith theforegoing and other objects in riew, our invention consists in certainnovel features of construction and arrangement ot parts, hereinaftermore fully described and claimed, and illustrated in the accompanyingdrawings, in which- Figure l is a side elevational view of our improved'fuse switch.

Figure 2 is a cross sectional view taken on line 2 2 of Figure 1,

Figure 3 is a detail showing the method of attaching the ruse to thebracket.

Figure is a detail showing the method of positioning the Yfuse to closethe circuit.`

Figure 5v is a cross section taken on line 5 5 of Figure l.

Figure 6 is an enlarged side elevational view of the lower one et thebrackets showing the lower end et the insulator in cross section,

Figure 7 is a. horizontal cross sectional view taken on line 7-7 ofFigure 6'.

The numeral l in the drawings indicates the cross arm ot a high tensionlinev pole. Q is a fuse switch bracket, the base 3 ot which is fastenedto arm l by U-bolt el. The upper leg' ot the' U-bolt engages lug 5 onbracket base 3, while the lower leg' engages slot 6 in the same member.The engagement of the lower leg of the U-bolt in slot 6 permits the useof several of U-lbolts and consequently provides for attaching thebracket 2 to various sizes of cross arms.

The upper portion or arm 7 of bracket 2 extends outwardly from the base3 and terminates in the: usual insulator carrying yoke S. Insulator 9 ismounted in the yoke 8 by suitable clamp members and' tie bolts whichlatter extend through the clamp members and have their ends secured tosaid yoke. In

CTI

the lower portion of the bracket base 3 a second slot 10 is located. Anoutwardly projecting arm 11 is mounted on the lower portion of bracketbase 3 through the intermediary of nut and bolt 12, which bolt engagesslot 10 and is adapted to position arm 11 at any height on base 3 withinthe limits of this slot. Arm 11 carries insulator 13 in a manner similarto arm 7.

Pins 14 having disks 15 ou their lower ends are cemented into theunderside of cach insulator 9 and 13. rllerminal carrying arms 19n and19 are provided with similar disks 1G which are preferably held infrictional yielding contact with their companions 15 by nuts and bolts17 forming trunnions.

This provides a pivotal connection between the terminal arms 19 and 19aand the supporting insulators 9 and 13, respectively, the purpose ofwhich is hereinafter described. The usual wire terminal connection meansand fuse contact holders consisting of bent copper clips 18 are mountedon the outer ends of these terminal carrying arms.

Depending from the out-er end of the lower terminal carrying arm 19 isan integral vertically disposed plate member 20. This plate lies in thelsame plane as the main body of the terminal carrying arm 19n andprovided in its forward edge with a rearwardly presented hook 21,thereby forming a hook shaped recess 21a.

The fuse proper consists of upper and lower `terminals 22 and A3 whichare joined by a l cartridge or horn fiber tubing 24.

The portion 25 of lower terminal 23 is squared for engagement withcontact holder 18. Below this squared portion are a pair of spaced,vertically disposed rearwardly projecting flanges 26. Looking at thefuse as it is shown in Figure 1 when positioned in the bracket, thelower corners of flanges 26 carry a. horizontally disposed pin 27 andthe upper corners are provided with aligned openings 28. A stud 29threaded into terminal 23 secures the lower end of the fuse wire 3 Thisfusible element 30 has its 'upper end secured within the. upper terminal22, and extends downwardly therethrough and outwardly through the loweropen end of said tube. l

The upper terminal 22 is also provided with a. squared portion 31 forengagemi-nt with its contact holder 18. A stud 32 engages the upper endof the fuse wire 30 interior-ly of the terminal. The eye portion 33 isii'itegral with the terminal and projects from its extremity. i

To apply the fuse to the bracket, a hook stick 34 is used. The hook isinserted in openings 28 of lianges 26 and the pin 27 of lower terminal23 is placed in the hook-shaped recess 21a of the lower terminalcarrying arm (see Fig. The hook stick is then disengaged and inserted ineye 33 of the upper terminal. As the upper terminal is swung into placewith pin 27 as the pivot, the flanges 26 engage therebetween plate 2Oand insure proper alignment of both termin als with their respectivecont-act holders 18 (Fig. 4). The hook stick is thus attached to thefuse adjacent the working point at all times which is a distinctadvantage since the length of these sticks is sometimes as much astwenty feet. Heretofore it has been found very difficult to insert inposition the free end of a fuse swinging on the end of a twenty-footpole and our improved construction greatly facilitates such operation.

To adjust the bracket for the accommodation of difl'erent length fuses,the lower arm 11 is raised or lowered, as the case may be, in slot 10.Nut and bolt 12 are utilized to lock this arm in position. Any movementof arm 11 after the bracket has been once set throws the upper and lowerContact holders 18 out of alignment. However, this alignment is restoredby shifting the terminal arms 19a and 19 at their pivotal connectionswith the pins 14. In assembling, the insulators 9 and 13 may be rotatedin their yokes to obtain the correct positions of the pins 14 but whenonce set there is no occasion to shift the positions of theseinsulators.

A very advantageous feature of our improved high tension fuse switchlies in forming the terminal arms 19 and 19 separate from pin 14. Thispin is held in the insulator by a cement which takes approximately sixtyhours to set. Heretofore it has been customary to form the entireterminal carrying arm in one piece and while the cement was setting itwas not unusual for the weight of the arm to shift its position in theinsulator so that when the cement set the part was not properly alignedand could not be used. It can be readily understood that there is muchless opportunity for our pin 14 to shift during the setting of thecement and even if shifting does take place the aforementionedadjustments can compensate for it. Consequently there are no insulatorassembly units rejected because of improperly positioned cemented parts.

The forward edge of plate 2() is inclined forwardly and upwardly abovehook 21 and terminates in a straight portion which, when the fuse is inposition, contacts with the body of the lower terminal 23, so that thepin 27 is firmly held in the extremity of recess 21. This same portion35 serves to prevent the introduction of the fuse in reversed orupsidedown position due to the offset location of pin 27. Where reversalof the fuse is possible, frequently the upper contact 18 is damaged bythe hook stick while the fuse is being inserted.

Disks 15 and 16 are preferably formed dishshaped so that only the edgesthereof come in contact, the body portions of said disks vio beingspaced. land providing a certain degree of resiliency foninaintainingsaid disls in propel' Contact engagement. Preferably thecontactinged-gesotzthe disks are slightly sei'- rated to insure properengagementl of thel disks-,so that only aicomparatively heavy shock or.recoil-movement liable to cause damage willicause the displacement otsaid disks relatively to` each other.

By forming the-terminal carrying arms sectional, whereby members 19a and19 are yieldable relativ-ely to pins 14, any severe blowsor recoil:shocks imparted to said members 198L and 19 fare absorbed thereby andare prevented from .being imparted to pins Il or insulators 9 and 13.Thus the rigidly supported parts are -proteetedagainst breakage and thelife andusefulness of the device is considerably` prolonged. Also theinterrup tion of. service incidental to the breakage of parts iseliminated.

It is to ibe understood'that minor changes in the form, size, andconstruction et the various parts of; our device can be made andsubstituted for those herein shown and described without departing tromthe spirit of our inventionas set orthin the appended claims. A

Vile .claim 1. In a line disconnecting switch, an insu-A latory carryingarm, asecond, insulz'itoil carrying arm adiustable withrespect to saidfirstmentioned arm, insulators carried by said arms, and switchterminals Apivotally supported from said insulators. y

2. Ina line disconnecting switch, a bracket, an insulator carrying armformed with and lixedin relation tosaid bracket, a second insnlatorcarrying arm mounted on .said bra cle't and movable alongA thevbracketwith respect to-said first-mentioned arm, means tor holding said secondinsulator arm in position..7 insulators carried bysaid arms, and meansadapted to positiona movable switch member between` saidy insulators.

3. Iln aline disconnecting switch, a switch bracket including a baseandan .insulator rying` arm, a second insulator carrying arm adjnstablyconnected tosaid base and me iable withrespect to said first-mentionedarm, in ixeddistance relation to said base, insulators carried by saidarms, and stationary switch terminals carriedby said i laters.

4. In line disconnecting switch, a switch bracket including a base, aninsulator carry-- ing arm projecting angularly from, formed integrallywith the hase, a second sulator carrying arm adjnstably connected tosaid base and movable along said base, C@

toward and away from said first-mentionml arm, insulators carried bysaid arms, switch contacts and a switch blade carrie-,l by saidinsulators.

In aline disconnecting switch, a bracket, a pair of spaced insulatorscarried by said bracket, pins mounted in said insulators, switchterminal arms having terminal portions, and carried by said pins,l theterminal portions thereof adapted ior pivotal movenient in a commonplane, and a movable switch member carried between said terminalportions.

(l. In a line disconnecting switch, a` bracket compi sing a. base, andan upper insulator cani-yingI arm termed on the base, a lowerinsi'slator carrying arm adjustably mounted on said base a ,d movable inresoect to .said lpper arm, insulators mounted on said insu- .atar arms,and terminal arms carried by said insulators, said tern'linal armsbeing;l pivotilly jointed intermediate their ends.r

7. In a line disconnecting switch, an insulator carrying bracket,insulators carried said bracket, and switch blade carrying arms mountedin said insulator, said arms beingl pivotally jointed intermediate theirIn a line disconnecting sw'tch, a brach et, a of spaced insulatorsarried hy said braiset, pins mounted in said insulators,

.,inal ying arms, means for adjusty angularly associatirn; said arms*ith said pins, and a switch blade member mounted on sat. terminalcarrying` arms.

l). In a line disconnecting switch, a pair ot spaced insulators, one otsaid insulators beadiustable toward and away fre .i its companion,terminal carrying arms mounted in said ii'isulators, switch terminals onsaid arms, and means for maintaining aligmnent ot said arms andterminals upon adjnstnieut of said movable insulator.

lO. In a line disconnecting switch, a pair ral iiisulators, one oit saidinsulators i ,ustablo toward and away from its minal carrying armsmounted ns'ulators, and a pivotal joint in said crmcdiate their ends torestore propnment upon movement ot' said insula- 1l. In a iin-edisconnecting switch, a base, a pair ot spaced insulators, means forregulatini;` the spacing ci" .said insulators, terminal carrjy'ingarngis carried by said insulators, switch terminals on said arms,adapted 'for disposition an angle to said base, and means permitting anangular movement, ior purposes ot aligning adjustment, of saidterminals. i

12. In a line disconnecting switch, a bracket, a sonar-:1l le U-holt iorconnection ot said bracket lo the cross z rin oit a pole, and means inbracket to accommodate dil'crent sizes ot Icl-bolts lor c oi variouscross sectional proportions.

-n a line discmecting switch, a brachg a slot thc"cin, a lug on saidbracket, woo having spaced l. L one oi' which is asap-ted to engage saidlug, and a pole cross arm adapted to be snugly engaged bythe main bodyof said U-bolt, the lower leg of said U-bolt engaging said slot adjacentsaid cross arm.

lll. In a fuse switch, a pair of spaced terminal carrying arms, a plateon one of said arms having a hooked recess therein, a fuse fartridge'including spaced terminals, and a tube extending between saidterminals, a pair of spaced flanges projecting laterally of one of saidterminals, and one thereof being provided with an aperture for afuse-mani pulating tool, a pin between said flanges adapted to engagesaid hooked recess with said flanges extending laterally of said plateto guide said tern'iinals into proper engage-- ment with said terminalcarrying arms.

l5. In a line disconnecting switch, a bracket, switch terminals, jointedterminal carrying arms and a remo 'able switch blade having contactiembers for introduction into said terminals, a hooked member formedintegral with one of said arms at a point beyond the terminal carriedthereby, a pair of flanges on one of said contact members, and a pinextending between said flanges and spaced laterally of the blad-e axis,from the conta :t member by which it is carried, said pin being adaptedto engage said hooked member to pivotally connect said blade to saidmember.

16. In a line disconnecting switch, a pair of spaced arms, switchcontact meml'rers carried bv said arms` a plate on one of said armshaving a hooked recess formed in the lower portion thereof, a movableswitch member including upper and lower terminals, spaced flange memberson said movable switch member, movable into guiding engagement with saidplate, and a pin disposed between said flange members, said pin adaptedto be introduced into said hook-ed recess to position said ieiovableswitch member, said pin being laterally offset from said lower terminal,and thereby adapted for movement into the extremity of said recess bythe abutment of the upper portion of said plate with the main body ofsaid lower terminal upon swinging said fuse into position.

17. As a new article of mamifacture, a fuse switch bracket having spacedarms, insulators and switch terminals carried by said arms, one of saidarms being movable toward and away from its companion for theaccommodation of dille/rent length fuse cartridges, and means providingfor angular adjustment of one of said switch terminals, in a planeparallel to that of the switch bracket.

18. As a new article of manufacture, a switch frame for a linedisconnecting switch, having brackets each insulated from the frame andprovided with a swinging joint to enable their adjusting movementdistantly and angularly relative to each other and to a switch blademember, whereby said brackets are adapted to carry disconnecting switchparts of different sizes.

19. In a device of the class described, a switch frame, a bracketmounted thereon for linear adjustment along the frame, an insulatorcarried by said bracket, and a carrying arm for switch parts, sai-d armbeing pivot-ally mounted on said insulator.

20. In a device of the class described, an electric high tension loadcarryingr member adapted to be cemented in and carried by an insulator,sai-d member being separably and yieldably joined adjacent its point ofconnection with said insulator to permit adj ustment thereof and also toyield under sev-ere shocks and a recoil.

21. A line disconnecting switch bracket for high tension transmissionlines, including in combination with a metallic frame having lateralextensions, an insulator carried by each extension, a member secured tosaid insulator and depending therefrom, said melnber having an aperturedenlargement, a terminal carrying member having an apertured enlargementcooperating with the first enlargement to constitute a swinging joint,means for clamping said enlargements together, whereby said terminalcarrying member may be angularly adjusted relative to said lirst namedmember.

Q2. A fuse switch bracket for high tension transmission lines comprisinga frame having lateral extensions, an insulator carried by veachextension, a rigidly mounted member depending from each insulator, and aterminal carrying arm secured at one end to the extremity of saidmember, said arm being frictionally held in position and being adaptedto become displaced when the fuse is subjected to severe recoil, therebyabsorbing the shock incidental thereto and preventing displacement ofthe fuse.

Q3. In a switch mounting for a line disconnecting switch, thecombination with a bracket, of a pair of spaced arms, a plate formedintegral with one of said arms and having its forward edge formed with arearwardly presented hook, a movable switch member-iincluding upper andlower terminals engageable with said arms, a pair of parallel spacedplates adapted to engage therebetween the plate of said arm, therebyaligning said movable switch member with both of said arms, and a pinoflisetlaterallyofthemovable switch member, and extending between saidpair of spaced plates for engaging the said hook and pivotallysupporting sai-d movable switch member.

24. In a mounting for high tension disconnecting switches, thecombination with a frame, of a pair of spaced terminal engaging armscarried thereby, a vertically disposed platc formed integral with one ofsaid arms and terminating in an upwardly presented hook, a switch blademember including terminals engageable with said arms, one of saidterminals having formed integral therewith a pair of spaced parallelplat-es for engaging therebetween said hook plate, thereby forming analigning guide for said blade member at least one of said parallelplates being formed to receive a fuse manipulating tool, for lifting theblade member onto and away from said hook, and a pin extending betweensaid spaced parallel plates lfor engaging said hook and forming apivotal mounting for said blade member.

25. In a mounting for high tension fuse switches, the combination with aframe, of a pair o1 spaced terminal engaging arms carried thereby andadjustable relatively to each other, said arms being yieldable fromnormal positions under .severe shocks to absorb the recoil when the fuseis blown, a vertically disposed plate iormed integral with one of saidarms and terminating in its forward edge with a rearwardly and upwardlypresented hook, a fuse including terminals engagea-ble with said arms,one of said terminals being provided with a vertically disposed slot forreceiving said vertically disposed plate whereby said use is held inalignment with said terminal engaging arms, and a pin extending acrossthe lower end of said slot for engaging said hook and forming a pivotalsupport :tor said fuse and one of said terminal engaging arms.

26. In a device of the class described, the combination with aninsulator adapted to be carried by a bracket, of a pin embedded in saidinsulator and depending therefrom, the lowerl end of said pin beingprovided with a circular apertured enlargement, a terminal engagingmember provided at one end with a circular apertured enlargement havinga frictional contact with the first enlargement, and bolt and nut meansextending through the apertures of said enlargements for clamping thelatter together and holding said terminal engaging arm in adjustedposition, said terminal engaging arm being yicldable under severeimpacts so as' to ab sorb the shock produced thereby and prevent injuryto the fuse switch assembly.

In testimony whereof we hereunto affix our signatures this 27th day of June, 1926.

JGHN B. TRESCOTT. SAMUEL S. BAKER.

